1343840565 has 32 divisors (see below), whose sum is σ = 2278613376. Its totient is φ = 673966080.

The previous prime is 1343840557. The next prime is 1343840587. The reversal of 1343840565 is 5650483431.

It is not a de Polignac number, because 1343840565 - 2³ = 1343840557 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 542169 + ... + 544641.

It is an arithmetic number, because the mean of its divisors is an integer number (71206668).

Almost surely, 2^1343840565 is an apocalyptic number.

1343840565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1343840565 is a deficient number, since it is larger than the sum of its proper divisors (934772811).

1343840565 is a wasteful number, since it uses less digits than its factorization.

1343840565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 1343840565 is about 36658.4310220719. The cubic root of 1343840565 is about 1103.5260310216.

The spelling of 1343840565 in words is "one billion, three hundred forty-three million, eight hundred forty thousand, five hundred sixty-five".